code: def test_component_class_is_registered():
      MyComponent = component_class("MyComponent")
      assert (
          component.registry["haystack.testing.factory.MyComponent"]
          == MyComponent
      )
  
file_path: haystack/test/testing/test_factory.py
imports: import pytest
  from haystack.dataclasses import Document
  from haystack.testing.factory import document_store_class, component_class
  from haystack.core.component import component
label_desc: Use image node_id 9 for calling a global function with example usage: test_component_class_is_registered() without return types